This is indeed not yet implemented in unity8, this will also require changes in the toolkit, as shell will need to mediate orientation between apps depending on sensors, orientation lock and relation between apps (i.e. app in mainstage, app in sidestage, but only one supports rotation).
This is indeed not yet implemented in unity8, this will also require changes in the toolkit, as shell will need to mediate orientation between apps depending on sensors, orientation lock and relation between apps (i.e. app in mainstage, app in sidestage, but only one supports rotation).
Marked as affecting toolkit, too.